Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2008-07-29
2008-07-29
Feild, Joseph (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S047500
Reexamination Certificate
active
07406015
ABSTRACT:
An 11T single signal and a 3T single signal are recorded on a DVD−RW at the optimum recording power P1and a recording power P2of an intensity of 85% with relative to the optimum recording power P1, and then these signals are reproduced to calculate asymmetry values A1 and A2. If a difference (A1-A2) between both asymmetry values is equal to or greater than a reference value of 0.05, it is judged that a method using the asymmetry value is available for the OPC, and if the difference is less than a reference value of 0.05, it is judged that the method is not available. Then, the judgment result is recorded on the DVD−RW as a flag. A DVD drive judges whether or not the asymmetry value is used for the OPC on the basis of the flag.
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Feild Joseph
Foley & Lardner LLP
Haley Joseph
NEC Corporation
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